Remove barcode reading code.

We never read barcodes, we only write them. Remove code related to barcode
reading.

Review-Url: https://codereview.chromium.org/2071633002

1 files changed, 0 insertions, 735 deletions

diff --git a/xfa/fxbarcode/pdf417/BC_PDF417ScanningDecoder.cpp b/xfa/fxbarcode/pdf417/BC_PDF417ScanningDecoder.cpp
deleted file mode 100644
index fb33fe0d3f..0000000000
--- a/xfa/fxbarcode/pdf417/BC_PDF417ScanningDecoder.cpp
+++ /dev/null
@@ -1,735 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-// Original code is licensed as follows:
-/*
- * Copyright 2013 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <memory>
-
-#include "xfa/fxbarcode/BC_ResultPoint.h"
-#include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417BarcodeMetadata.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417BarcodeValue.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417BoundingBox.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417Codeword.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417Common.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417DetectionResult.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417DetectionResultColumn.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417DetectionResultRowIndicatorColumn.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417ECErrorCorrection.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusGF.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.h"
-#include "xfa/fxbarcode/pdf417/BC_PDF417ScanningDecoder.h"
-#include "xfa/fxbarcode/utils.h"
-
-int32_t CBC_PDF417ScanningDecoder::CODEWORD_SKEW_SIZE = 2;
-int32_t CBC_PDF417ScanningDecoder::MAX_ERRORS = 3;
-int32_t CBC_PDF417ScanningDecoder::MAX_EC_CODEWORDS = 512;
-CBC_PDF417ECErrorCorrection* CBC_PDF417ScanningDecoder::errorCorrection =
-    nullptr;
-
-CBC_PDF417ScanningDecoder::CBC_PDF417ScanningDecoder() {}
-CBC_PDF417ScanningDecoder::~CBC_PDF417ScanningDecoder() {}
-void CBC_PDF417ScanningDecoder::Initialize() {
-  errorCorrection = new CBC_PDF417ECErrorCorrection;
-}
-void CBC_PDF417ScanningDecoder::Finalize() {
-  delete errorCorrection;
-}
-CBC_CommonDecoderResult* CBC_PDF417ScanningDecoder::decode(
-    CBC_CommonBitMatrix* image,
-    CBC_ResultPoint* imageTopLeft,
-    CBC_ResultPoint* imageBottomLeft,
-    CBC_ResultPoint* imageTopRight,
-    CBC_ResultPoint* imageBottomRight,
-    int32_t minCodewordWidth,
-    int32_t maxCodewordWidth,
-    int32_t& e) {
-  CBC_BoundingBox* boundingBox = new CBC_BoundingBox(
-      image, imageTopLeft, imageBottomLeft, imageTopRight, imageBottomRight, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
-  CBC_DetectionResultRowIndicatorColumn* leftRowIndicatorColumn = nullptr;
-  CBC_DetectionResultRowIndicatorColumn* rightRowIndicatorColumn = nullptr;
-  CBC_DetectionResult* detectionResult = nullptr;
-  for (int32_t i = 0; i < 2; i++) {
-    if (imageTopLeft) {
-      leftRowIndicatorColumn =
-          getRowIndicatorColumn(image, boundingBox, *imageTopLeft, TRUE,
-                                minCodewordWidth, maxCodewordWidth);
-    }
-    if (imageTopRight) {
-      rightRowIndicatorColumn =
-          getRowIndicatorColumn(image, boundingBox, *imageTopRight, FALSE,
-                                minCodewordWidth, maxCodewordWidth);
-    }
-    detectionResult = merge(leftRowIndicatorColumn, rightRowIndicatorColumn, e);
-    if (e != BCExceptionNO) {
-      e = BCExceptiontNotFoundInstance;
-      delete leftRowIndicatorColumn;
-      delete rightRowIndicatorColumn;
-      delete boundingBox;
-      return nullptr;
-    }
-    if (i == 0 && (detectionResult->getBoundingBox()->getMinY() <
-                       boundingBox->getMinY() ||
-                   detectionResult->getBoundingBox()->getMaxY() >
-                       boundingBox->getMaxY())) {
-      delete boundingBox;
-      boundingBox = detectionResult->getBoundingBox();
-    } else {
-      detectionResult->setBoundingBox(boundingBox);
-      break;
-    }
-  }
-  int32_t maxBarcodeColumn = detectionResult->getBarcodeColumnCount() + 1;
-  detectionResult->setDetectionResultColumn(0, leftRowIndicatorColumn);
-  detectionResult->setDetectionResultColumn(maxBarcodeColumn,
-                                            rightRowIndicatorColumn);
-  FX_BOOL leftToRight = !!leftRowIndicatorColumn;
-  for (int32_t barcodeColumnCount = 1; barcodeColumnCount <= maxBarcodeColumn;
-       barcodeColumnCount++) {
-    int32_t barcodeColumn = leftToRight ? barcodeColumnCount
-                                        : maxBarcodeColumn - barcodeColumnCount;
-    if (detectionResult->getDetectionResultColumn(barcodeColumn)) {
-      continue;
-    }
-    CBC_DetectionResultColumn* detectionResultColumn = nullptr;
-    if (barcodeColumn == 0 || barcodeColumn == maxBarcodeColumn) {
-      detectionResultColumn = new CBC_DetectionResultRowIndicatorColumn(
-          boundingBox, barcodeColumn == 0);
-    } else {
-      detectionResultColumn = new CBC_DetectionResultColumn(boundingBox);
-    }
-    detectionResult->setDetectionResultColumn(barcodeColumn,
-                                              detectionResultColumn);
-    int32_t startColumn = -1;
-    int32_t previousStartColumn = startColumn;
-    for (int32_t imageRow = boundingBox->getMinY();
-         imageRow <= boundingBox->getMaxY(); imageRow++) {
-      startColumn =
-          getStartColumn(detectionResult, barcodeColumn, imageRow, leftToRight);
-      if (startColumn < 0 || startColumn > boundingBox->getMaxX()) {
-        if (previousStartColumn == -1) {
-          continue;
-        }
-        startColumn = previousStartColumn;
-      }
-      CBC_Codeword* codeword = detectCodeword(
-          image, boundingBox->getMinX(), boundingBox->getMaxX(), leftToRight,
-          startColumn, imageRow, minCodewordWidth, maxCodewordWidth);
-      if (codeword) {
-        detectionResultColumn->setCodeword(imageRow, codeword);
-        previousStartColumn = startColumn;
-        minCodewordWidth = minCodewordWidth < codeword->getWidth()
-                               ? minCodewordWidth
-                               : codeword->getWidth();
-        maxCodewordWidth = maxCodewordWidth > codeword->getWidth()
-                               ? maxCodewordWidth
-                               : codeword->getWidth();
-      }
-    }
-  }
-  CBC_CommonDecoderResult* decoderresult =
-      createDecoderResult(detectionResult, e);
-  if (e != BCExceptionNO) {
-    delete detectionResult;
-    return nullptr;
-  }
-  return decoderresult;
-}
-
-CFX_ByteString CBC_PDF417ScanningDecoder::toString(
-    CBC_BarcodeValueArrayArray* barcodeMatrix) {
-  CFX_ByteString result;
-  for (int32_t row = 0; row < barcodeMatrix->GetSize(); row++) {
-    result += row;
-    for (int32_t l = 0; l < barcodeMatrix->GetAt(row)->GetSize(); l++) {
-      CBC_BarcodeValue* barcodeValue = barcodeMatrix->GetAt(row)->GetAt(l);
-      if (barcodeValue->getValue()->GetSize() == 0) {
-        result += "";
-      } else {
-        result += barcodeValue->getValue()->GetAt(0);
-        result +=
-            barcodeValue->getConfidence(barcodeValue->getValue()->GetAt(0));
-      }
-    }
-  }
-  return result;
-}
-
-CBC_DetectionResult* CBC_PDF417ScanningDecoder::merge(
-    CBC_DetectionResultRowIndicatorColumn* leftRowIndicatorColumn,
-    CBC_DetectionResultRowIndicatorColumn* rightRowIndicatorColumn,
-    int32_t& e) {
-  if (!leftRowIndicatorColumn && !rightRowIndicatorColumn) {
-    e = BCExceptionIllegalArgument;
-    return nullptr;
-  }
-  CBC_BarcodeMetadata* barcodeMetadata =
-      getBarcodeMetadata(leftRowIndicatorColumn, rightRowIndicatorColumn);
-  if (!barcodeMetadata) {
-    e = BCExceptionCannotMetadata;
-    return nullptr;
-  }
-  CBC_BoundingBox* leftboundingBox =
-      adjustBoundingBox(leftRowIndicatorColumn, e);
-  if (e != BCExceptionNO) {
-    delete barcodeMetadata;
-    return nullptr;
-  }
-  CBC_BoundingBox* rightboundingBox =
-      adjustBoundingBox(rightRowIndicatorColumn, e);
-  if (e != BCExceptionNO) {
-    delete barcodeMetadata;
-    return nullptr;
-  }
-  CBC_BoundingBox* boundingBox =
-      CBC_BoundingBox::merge(leftboundingBox, rightboundingBox, e);
-  if (e != BCExceptionNO) {
-    delete barcodeMetadata;
-    return nullptr;
-  }
-  CBC_DetectionResult* detectionresult =
-      new CBC_DetectionResult(barcodeMetadata, boundingBox);
-  return detectionresult;
-}
-CBC_BoundingBox* CBC_PDF417ScanningDecoder::adjustBoundingBox(
-    CBC_DetectionResultRowIndicatorColumn* rowIndicatorColumn,
-    int32_t& e) {
-  if (!rowIndicatorColumn)
-    return nullptr;
-
-  CFX_Int32Array* rowHeights = rowIndicatorColumn->getRowHeights(e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
-  int32_t maxRowHeight = getMax(*rowHeights);
-  int32_t missingStartRows = 0;
-  for (int32_t i = 0; i < rowHeights->GetSize(); i++) {
-    int32_t rowHeight = rowHeights->GetAt(i);
-    missingStartRows += maxRowHeight - rowHeight;
-    if (rowHeight > 0) {
-      break;
-    }
-  }
-  CFX_ArrayTemplate<CBC_Codeword*>* codewords =
-      rowIndicatorColumn->getCodewords();
-  for (int32_t row = 0; missingStartRows > 0 && !codewords->GetAt(row); row++) {
-    missingStartRows--;
-  }
-  int32_t missingEndRows = 0;
-  for (int32_t row1 = rowHeights->GetSize() - 1; row1 >= 0; row1--) {
-    missingEndRows += maxRowHeight - rowHeights->GetAt(row1);
-    if (rowHeights->GetAt(row1) > 0) {
-      break;
-    }
-  }
-  for (int32_t row2 = codewords->GetSize() - 1;
-       missingEndRows > 0 && !codewords->GetAt(row2); row2--) {
-    missingEndRows--;
-  }
-  CBC_BoundingBox* boundingBox =
-      rowIndicatorColumn->getBoundingBox()->addMissingRows(
-          missingStartRows, missingEndRows, rowIndicatorColumn->isLeft(), e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
-  return boundingBox;
-}
-int32_t CBC_PDF417ScanningDecoder::getMax(CFX_Int32Array& values) {
-  int32_t maxValue = -1;
-  for (int32_t i = 0; i < values.GetSize(); i++) {
-    int32_t value = values.GetAt(i);
-    maxValue = maxValue > value ? maxValue : value;
-  }
-  return maxValue;
-}
-CBC_BarcodeMetadata* CBC_PDF417ScanningDecoder::getBarcodeMetadata(
-    CBC_DetectionResultRowIndicatorColumn* leftRowIndicatorColumn,
-    CBC_DetectionResultRowIndicatorColumn* rightRowIndicatorColumn) {
-  CBC_BarcodeMetadata* leftBarcodeMetadata =
-      leftRowIndicatorColumn ? leftRowIndicatorColumn->getBarcodeMetadata()
-                             : nullptr;
-  if (!leftBarcodeMetadata) {
-    return rightRowIndicatorColumn
-               ? rightRowIndicatorColumn->getBarcodeMetadata()
-               : nullptr;
-  }
-
-  CBC_BarcodeMetadata* rightBarcodeMetadata =
-      rightRowIndicatorColumn ? rightRowIndicatorColumn->getBarcodeMetadata()
-                              : nullptr;
-  if (!rightBarcodeMetadata) {
-    return leftRowIndicatorColumn ? leftRowIndicatorColumn->getBarcodeMetadata()
-                                  : nullptr;
-  }
-
-  if (leftBarcodeMetadata->getColumnCount() !=
-          rightBarcodeMetadata->getColumnCount() &&
-      leftBarcodeMetadata->getErrorCorrectionLevel() !=
-          rightBarcodeMetadata->getErrorCorrectionLevel() &&
-      leftBarcodeMetadata->getRowCount() !=
-          rightBarcodeMetadata->getRowCount()) {
-    delete leftBarcodeMetadata;
-    delete rightBarcodeMetadata;
-    return nullptr;
-  }
-  delete rightBarcodeMetadata;
-  return leftBarcodeMetadata;
-}
-CBC_DetectionResultRowIndicatorColumn*
-CBC_PDF417ScanningDecoder::getRowIndicatorColumn(CBC_CommonBitMatrix* image,
-                                                 CBC_BoundingBox* boundingBox,
-                                                 CBC_ResultPoint startPoint,
-                                                 FX_BOOL leftToRight,
-                                                 int32_t minCodewordWidth,
-                                                 int32_t maxCodewordWidth) {
-  CBC_DetectionResultRowIndicatorColumn* rowIndicatorColumn =
-      new CBC_DetectionResultRowIndicatorColumn(boundingBox, leftToRight);
-  for (int32_t i = 0; i < 2; i++) {
-    int32_t increment = i == 0 ? 1 : -1;
-    int32_t startColumn = (int32_t)startPoint.GetX();
-    for (int32_t imageRow = (int32_t)startPoint.GetY();
-         imageRow <= boundingBox->getMaxY() &&
-         imageRow >= boundingBox->getMinY();
-         imageRow += increment) {
-      CBC_Codeword* codeword =
-          detectCodeword(image, 0, image->GetWidth(), leftToRight, startColumn,
-                         imageRow, minCodewordWidth, maxCodewordWidth);
-      if (codeword) {
-        rowIndicatorColumn->setCodeword(imageRow, codeword);
-        if (leftToRight) {
-          startColumn = codeword->getStartX();
-        } else {
-          startColumn = codeword->getEndX();
-        }
-      }
-    }
-  }
-  return rowIndicatorColumn;
-}
-
-void CBC_PDF417ScanningDecoder::adjustCodewordCount(
-    CBC_DetectionResult* detectionResult,
-    CBC_BarcodeValueArrayArray* barcodeMatrix,
-    int32_t& e) {
-  std::unique_ptr<CFX_Int32Array> numberOfCodewords(
-      barcodeMatrix->GetAt(0)->GetAt(1)->getValue());
-  int32_t calculatedNumberOfCodewords =
-      detectionResult->getBarcodeColumnCount() *
-          detectionResult->getBarcodeRowCount() -
-      getNumberOfECCodeWords(detectionResult->getBarcodeECLevel());
-  if (numberOfCodewords->GetSize() == 0) {
-    if (calculatedNumberOfCodewords < 1 ||
-        calculatedNumberOfCodewords >
-            CBC_PDF417Common::MAX_CODEWORDS_IN_BARCODE) {
-      e = BCExceptiontNotFoundInstance;
-      BC_EXCEPTION_CHECK_ReturnVoid(e);
-    }
-    barcodeMatrix->GetAt(0)->GetAt(1)->setValue(calculatedNumberOfCodewords);
-  } else if (numberOfCodewords->GetAt(0) != calculatedNumberOfCodewords) {
-    barcodeMatrix->GetAt(0)->GetAt(1)->setValue(calculatedNumberOfCodewords);
-  }
-}
-
-CBC_CommonDecoderResult* CBC_PDF417ScanningDecoder::createDecoderResult(
-    CBC_DetectionResult* detectionResult,
-    int32_t& e) {
-  std::unique_ptr<CBC_BarcodeValueArrayArray> barcodeMatrix(
-      createBarcodeMatrix(detectionResult));
-  adjustCodewordCount(detectionResult, barcodeMatrix.get(), e);
-  if (e != BCExceptionNO) {
-    for (int32_t i = 0; i < barcodeMatrix->GetSize(); i++) {
-      CBC_BarcodeValueArray* temp = barcodeMatrix->GetAt(i);
-      for (int32_t j = 0; j < temp->GetSize(); j++)
-        delete temp->GetAt(j);
-      delete temp;
-    }
-    return nullptr;
-  }
-  CFX_Int32Array erasures;
-  CFX_Int32Array codewords;
-  codewords.SetSize(detectionResult->getBarcodeRowCount() *
-                    detectionResult->getBarcodeColumnCount());
-  CFX_ArrayTemplate<CFX_Int32Array*> ambiguousIndexValuesList;
-  CFX_Int32Array ambiguousIndexesList;
-  for (int32_t row = 0; row < detectionResult->getBarcodeRowCount(); row++) {
-    for (int32_t l = 0; l < detectionResult->getBarcodeColumnCount(); l++) {
-      CFX_Int32Array* values =
-          barcodeMatrix->GetAt(row)->GetAt(l + 1)->getValue();
-      int32_t codewordIndex =
-          row * detectionResult->getBarcodeColumnCount() + l;
-      if (values->GetSize() == 0) {
-        erasures.Add(codewordIndex);
-      } else if (values->GetSize() == 1) {
-        codewords[codewordIndex] = values->GetAt(0);
-      } else {
-        ambiguousIndexesList.Add(codewordIndex);
-        ambiguousIndexValuesList.Add(values);
-      }
-    }
-  }
-  CFX_ArrayTemplate<CFX_Int32Array*> ambiguousIndexValues;
-  ambiguousIndexValues.SetSize(ambiguousIndexValuesList.GetSize());
-  for (int32_t i = 0; i < ambiguousIndexValues.GetSize(); i++) {
-    ambiguousIndexValues.SetAt(i, ambiguousIndexValuesList.GetAt(i));
-  }
-  for (int32_t l = 0; l < barcodeMatrix->GetSize(); l++) {
-    CBC_BarcodeValueArray* temp = barcodeMatrix->GetAt(l);
-    for (int32_t j = 0; j < temp->GetSize(); j++)
-      delete temp->GetAt(j);
-    temp->RemoveAll();
-    delete temp;
-  }
-  CBC_CommonDecoderResult* decoderResult =
-      createDecoderResultFromAmbiguousValues(
-          detectionResult->getBarcodeECLevel(), codewords, erasures,
-          ambiguousIndexesList, ambiguousIndexValues, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
-  return decoderResult;
-}
-
-CBC_CommonDecoderResult*
-CBC_PDF417ScanningDecoder::createDecoderResultFromAmbiguousValues(
-    int32_t ecLevel,
-    CFX_Int32Array& codewords,
-    CFX_Int32Array& erasureArray,
-    CFX_Int32Array& ambiguousIndexes,
-    CFX_ArrayTemplate<CFX_Int32Array*>& ambiguousIndexValues,
-    int32_t& e) {
-  CFX_Int32Array ambiguousIndexCount;
-  ambiguousIndexCount.SetSize(ambiguousIndexes.GetSize());
-  int32_t tries = 100;
-  while (tries-- > 0) {
-    for (int32_t l = 0; l < ambiguousIndexCount.GetSize(); l++) {
-      codewords[ambiguousIndexes[l]] =
-          ambiguousIndexValues.GetAt(l)->GetAt(ambiguousIndexCount[l]);
-    }
-    CBC_CommonDecoderResult* decoderResult =
-        decodeCodewords(codewords, ecLevel, erasureArray, e);
-    if (e == BCExceptionNO)
-      return decoderResult;
-
-    e = BCExceptionNO;
-    if (ambiguousIndexCount.GetSize() == 0) {
-      e = BCExceptionChecksumInstance;
-      return nullptr;
-    }
-    for (int32_t i = 0; i < ambiguousIndexCount.GetSize(); i++) {
-      if (ambiguousIndexCount[i] <
-          ambiguousIndexValues.GetAt(i)->GetSize() - 1) {
-        ambiguousIndexCount[i]++;
-        break;
-      } else {
-        ambiguousIndexCount[i] = 0;
-        if (i == ambiguousIndexCount.GetSize() - 1) {
-          e = BCExceptionChecksumInstance;
-          return nullptr;
-        }
-      }
-    }
-  }
-  e = BCExceptionChecksumInstance;
-  return nullptr;
-}
-CBC_BarcodeValueArrayArray* CBC_PDF417ScanningDecoder::createBarcodeMatrix(
-    CBC_DetectionResult* detectionResult) {
-  CBC_BarcodeValueArrayArray* barcodeMatrix = new CBC_BarcodeValueArrayArray;
-  barcodeMatrix->SetSize(detectionResult->getBarcodeRowCount());
-  for (int32_t row = 0; row < barcodeMatrix->GetSize(); row++) {
-    CBC_BarcodeValueArray* temp = new CBC_BarcodeValueArray;
-    temp->SetSize(detectionResult->getBarcodeColumnCount() + 2);
-    for (int32_t column = 0;
-         column < detectionResult->getBarcodeColumnCount() + 2; column++) {
-      temp->SetAt(column, new CBC_BarcodeValue());
-    }
-    barcodeMatrix->SetAt(row, temp);
-  }
-  for (int32_t i = 0;
-       i < detectionResult->getDetectionResultColumns().GetSize(); i++) {
-    CBC_DetectionResultColumn* detectionResultColumn =
-        detectionResult->getDetectionResultColumns().GetAt(i);
-    if (!detectionResultColumn)
-      continue;
-
-    CFX_ArrayTemplate<CBC_Codeword*>* temp =
-        detectionResultColumn->getCodewords();
-    for (int32_t l = 0; l < temp->GetSize(); l++) {
-      CBC_Codeword* codeword = temp->GetAt(l);
-      if (!codeword || codeword->getRowNumber() == -1)
-        continue;
-
-      barcodeMatrix->GetAt(codeword->getRowNumber())
-          ->GetAt(i)
-          ->setValue(codeword->getValue());
-    }
-  }
-  return barcodeMatrix;
-}
-FX_BOOL CBC_PDF417ScanningDecoder::isValidBarcodeColumn(
-    CBC_DetectionResult* detectionResult,
-    int32_t barcodeColumn) {
-  return barcodeColumn >= 0 &&
-         barcodeColumn <= detectionResult->getBarcodeColumnCount() + 1;
-}
-int32_t CBC_PDF417ScanningDecoder::getStartColumn(
-    CBC_DetectionResult* detectionResult,
-    int32_t barcodeColumn,
-    int32_t imageRow,
-    FX_BOOL leftToRight) {
-  int32_t offset = leftToRight ? 1 : -1;
-  CBC_Codeword* codeword = nullptr;
-  if (isValidBarcodeColumn(detectionResult, barcodeColumn - offset)) {
-    codeword = detectionResult->getDetectionResultColumn(barcodeColumn - offset)
-                   ->getCodeword(imageRow);
-  }
-  if (codeword) {
-    return leftToRight ? codeword->getEndX() : codeword->getStartX();
-  }
-  codeword = detectionResult->getDetectionResultColumn(barcodeColumn)
-                 ->getCodewordNearby(imageRow);
-  if (codeword) {
-    return leftToRight ? codeword->getStartX() : codeword->getEndX();
-  }
-  if (isValidBarcodeColumn(detectionResult, barcodeColumn - offset)) {
-    codeword = detectionResult->getDetectionResultColumn(barcodeColumn - offset)
-                   ->getCodewordNearby(imageRow);
-  }
-  if (codeword) {
-    return leftToRight ? codeword->getEndX() : codeword->getStartX();
-  }
-  int32_t skippedColumns = 0;
-  while (isValidBarcodeColumn(detectionResult, barcodeColumn - offset)) {
-    barcodeColumn -= offset;
-    for (int32_t i = 0;
-         i < detectionResult->getDetectionResultColumn(barcodeColumn)
-                 ->getCodewords()
-                 ->GetSize();
-         i++) {
-      CBC_Codeword* previousRowCodeword =
-          detectionResult->getDetectionResultColumn(barcodeColumn)
-              ->getCodewords()
-              ->GetAt(i);
-      if (previousRowCodeword) {
-        return (leftToRight ? previousRowCodeword->getEndX()
-                            : previousRowCodeword->getStartX()) +
-               offset * skippedColumns * (previousRowCodeword->getEndX() -
-                                          previousRowCodeword->getStartX());
-      }
-    }
-    skippedColumns++;
-  }
-  return leftToRight ? detectionResult->getBoundingBox()->getMinX()
-                     : detectionResult->getBoundingBox()->getMaxX();
-}
-CBC_Codeword* CBC_PDF417ScanningDecoder::detectCodeword(
-    CBC_CommonBitMatrix* image,
-    int32_t minColumn,
-    int32_t maxColumn,
-    FX_BOOL leftToRight,
-    int32_t startColumn,
-    int32_t imageRow,
-    int32_t minCodewordWidth,
-    int32_t maxCodewordWidth) {
-  startColumn = adjustCodewordStartColumn(image, minColumn, maxColumn,
-                                          leftToRight, startColumn, imageRow);
-  CFX_Int32Array* moduleBitCount = getModuleBitCount(
-      image, minColumn, maxColumn, leftToRight, startColumn, imageRow);
-  if (!moduleBitCount)
-    return nullptr;
-
-  int32_t endColumn;
-  int32_t codewordBitCount = CBC_PDF417Common::getBitCountSum(*moduleBitCount);
-  if (leftToRight) {
-    endColumn = startColumn + codewordBitCount;
-  } else {
-    for (int32_t i = 0; i<moduleBitCount->GetSize()>> 1; i++) {
-      int32_t tmpCount = moduleBitCount->GetAt(i);
-      moduleBitCount->SetAt(
-          i, moduleBitCount->GetAt(moduleBitCount->GetSize() - 1 - i));
-      moduleBitCount->SetAt(moduleBitCount->GetSize() - 1 - i, tmpCount);
-    }
-    endColumn = startColumn;
-    startColumn = endColumn - codewordBitCount;
-  }
-  int32_t decodedValue =
-      CBC_PDF417CodewordDecoder::getDecodedValue(*moduleBitCount);
-  int32_t codeword = CBC_PDF417Common::getCodeword(decodedValue);
-  delete moduleBitCount;
-  if (codeword == -1) {
-    return nullptr;
-  }
-  return new CBC_Codeword(startColumn, endColumn,
-                          getCodewordBucketNumber(decodedValue), codeword);
-}
-CFX_Int32Array* CBC_PDF417ScanningDecoder::getModuleBitCount(
-    CBC_CommonBitMatrix* image,
-    int32_t minColumn,
-    int32_t maxColumn,
-    FX_BOOL leftToRight,
-    int32_t startColumn,
-    int32_t imageRow) {
-  int32_t imageColumn = startColumn;
-  CFX_Int32Array* moduleBitCount = new CFX_Int32Array;
-  moduleBitCount->SetSize(8);
-  int32_t moduleNumber = 0;
-  int32_t increment = leftToRight ? 1 : -1;
-  FX_BOOL previousPixelValue = leftToRight;
-  while (((leftToRight && imageColumn < maxColumn) ||
-          (!leftToRight && imageColumn >= minColumn)) &&
-         moduleNumber < moduleBitCount->GetSize()) {
-    if (image->Get(imageColumn, imageRow) == previousPixelValue) {
-      moduleBitCount->SetAt(moduleNumber,
-                            moduleBitCount->GetAt(moduleNumber) + 1);
-      imageColumn += increment;
-    } else {
-      moduleNumber++;
-      previousPixelValue = !previousPixelValue;
-    }
-  }
-  if (moduleNumber == moduleBitCount->GetSize() ||
-      (((leftToRight && imageColumn == maxColumn) ||
-        (!leftToRight && imageColumn == minColumn)) &&
-       moduleNumber == moduleBitCount->GetSize() - 1)) {
-    return moduleBitCount;
-  }
-  delete moduleBitCount;
-  return nullptr;
-}
-int32_t CBC_PDF417ScanningDecoder::getNumberOfECCodeWords(
-    int32_t barcodeECLevel) {
-  return 2 << barcodeECLevel;
-}
-int32_t CBC_PDF417ScanningDecoder::adjustCodewordStartColumn(
-    CBC_CommonBitMatrix* image,
-    int32_t minColumn,
-    int32_t maxColumn,
-    FX_BOOL leftToRight,
-    int32_t codewordStartColumn,
-    int32_t imageRow) {
-  int32_t correctedStartColumn = codewordStartColumn;
-  int32_t increment = leftToRight ? -1 : 1;
-  for (int32_t i = 0; i < 2; i++) {
-    while (((leftToRight && correctedStartColumn >= minColumn) ||
-            (!leftToRight && correctedStartColumn < maxColumn)) &&
-           leftToRight == image->Get(correctedStartColumn, imageRow)) {
-      if (abs(codewordStartColumn - correctedStartColumn) >
-          CODEWORD_SKEW_SIZE) {
-        return codewordStartColumn;
-      }
-      correctedStartColumn += increment;
-    }
-    increment = -increment;
-    leftToRight = !leftToRight;
-  }
-  return correctedStartColumn;
-}
-FX_BOOL CBC_PDF417ScanningDecoder::checkCodewordSkew(int32_t codewordSize,
-                                                     int32_t minCodewordWidth,
-                                                     int32_t maxCodewordWidth) {
-  return minCodewordWidth - CODEWORD_SKEW_SIZE <= codewordSize &&
-         codewordSize <= maxCodewordWidth + CODEWORD_SKEW_SIZE;
-}
-CBC_CommonDecoderResult* CBC_PDF417ScanningDecoder::decodeCodewords(
-    CFX_Int32Array& codewords,
-    int32_t ecLevel,
-    CFX_Int32Array& erasures,
-    int32_t& e) {
-  if (codewords.GetSize() == 0) {
-    e = BCExceptionFormatInstance;
-    return nullptr;
-  }
-  int32_t numECCodewords = 1 << (ecLevel + 1);
-  correctErrors(codewords, erasures, numECCodewords, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
-  verifyCodewordCount(codewords, numECCodewords, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
-  CFX_ByteString bytestring;
-  CBC_CommonDecoderResult* decoderResult = CBC_DecodedBitStreamPaser::decode(
-      codewords, bytestring.FormatInteger(ecLevel), e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
-  return decoderResult;
-}
-int32_t CBC_PDF417ScanningDecoder::correctErrors(CFX_Int32Array& codewords,
-                                                 CFX_Int32Array& erasures,
-                                                 int32_t numECCodewords,
-                                                 int32_t& e) {
-  if ((erasures.GetSize() != 0 &&
-       erasures.GetSize() > (numECCodewords / 2 + MAX_ERRORS)) ||
-      numECCodewords < 0 || numECCodewords > MAX_EC_CODEWORDS) {
-    e = BCExceptionChecksumInstance;
-    return -1;
-  }
-  int32_t result = CBC_PDF417ECErrorCorrection::decode(
-      codewords, numECCodewords, erasures, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, -1);
-  return result;
-}
-void CBC_PDF417ScanningDecoder::verifyCodewordCount(CFX_Int32Array& codewords,
-                                                    int32_t numECCodewords,
-                                                    int32_t& e) {
-  if (codewords.GetSize() < 4) {
-    e = BCExceptionFormatInstance;
-    return;
-  }
-  int32_t numberOfCodewords = codewords.GetAt(0);
-  if (numberOfCodewords > codewords.GetSize()) {
-    e = BCExceptionFormatInstance;
-    return;
-  }
-  if (numberOfCodewords == 0) {
-    if (numECCodewords < codewords.GetSize()) {
-      codewords[0] = codewords.GetSize() - numECCodewords;
-    } else {
-      e = BCExceptionFormatInstance;
-      return;
-    }
-  }
-}
-CFX_Int32Array* CBC_PDF417ScanningDecoder::getBitCountForCodeword(
-    int32_t codeword) {
-  CFX_Int32Array* result = new CFX_Int32Array;
-  result->SetSize(8);
-  int32_t previousValue = 0;
-  int32_t i = result->GetSize() - 1;
-  while (TRUE) {
-    if ((codeword & 0x1) != previousValue) {
-      previousValue = codeword & 0x1;
-      i--;
-      if (i < 0) {
-        break;
-      }
-    }
-    result->SetAt(i, result->GetAt(i) + 1);
-    codeword >>= 1;
-  }
-  return result;
-}
-int32_t CBC_PDF417ScanningDecoder::getCodewordBucketNumber(int32_t codeword) {
-  CFX_Int32Array* array = getBitCountForCodeword(codeword);
-  int32_t result = getCodewordBucketNumber(*array);
-  delete array;
-  return result;
-}
-int32_t CBC_PDF417ScanningDecoder::getCodewordBucketNumber(
-    CFX_Int32Array& moduleBitCount) {
-  return (moduleBitCount.GetAt(0) - moduleBitCount.GetAt(2) +
-          moduleBitCount.GetAt(4) - moduleBitCount.GetAt(6) + 9) %
-         9;
-}